Do not be overcome by evil, but overcome evil with good (Romans 12:21 NIV).

Often times your emotions will try to guide you into doing or saying something that is wrong.  You may know that it is wrong, but have reasoned in your thoughts that you will repay the person for an injustice that they did to you.  Do not take revenge, my dear friends, but leave room for God’s wrath, for it is written: “It is mine to avenge; I will repay,” says the Lord (Romans 12:19). Walk as dear children of God, and do what is right.